Abstract Vegetation information influences evapotranspiration (ET) and hence affects the hydrological cycle. Understanding the impact of biophysical variable such as Leaf Area Index (LAI) on watershed hydrology can clarify the water balance of a watershed. This study investigates the impact of vegetation information on ET, soil moisture, groundwater recharge and streamflow by using two different sources of spatial LAI data (Terra MODIS and NOAA AVHRR) in the calculation of FAO Penman-Monteith ET. For a 6661.3 km2 mountainous watershed in South Korea, the SLURP (Semi-distributed Land Use-based Runoff Processes) hydrological model was calibrated and verified based on 4 years MODIS LAI data with average Nash-Sutcliffe model efficiency of 0.67. The results indicate that the two watershed ETs vary within 4%, and the deciduous and coniferous ETs vary within 6.8% and 11.2% respectively. The two ETs affected maximum 2.4%, 6.1%, and 8.8% differences of soil moisture, groundwater recharge, and streamflow respectively.


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    Title :

    Comparison of hydrological responses by two different satellite remotely sensed leaf area indices in a mountainous watershed of South Korea


    Contributors:
    Ha, Rim (author) / Shin, Hyung Jin (author) / Park, Min Ji (author) / Kim, Seong Joon (author)

    Published in:

    Publication date :

    2010-07-17


    Size :

    12 pages




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    English





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